New favourite toy/tool

While someone was using my laptop (I'm not going to name names), my MacBook, they launched a number of windows and programs, didn't know how to close them, and left. This would typically be much to my chagrin, however, somehow she launched Speech commands. Oh my. I have found my new favourite Mac tool/function/toy, methinks.

30-second later EDIT: AND you can get it to tell you knock knock jokes! ("tell me a joke")